contrib: speex: avoid automatically depending on ogg
contrib: speex: avoid automatically depending on ogg

ogg was still being pulled in as a dependency when cross-compiling, which
would break certain build configurations.

(cherry picked from commit 4c63aa1192dc4148b8c540b0b7210aa91713505b)

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2